Is this a bug: ModelLocator.ArrayCollection.length

Question

ModelLocator.ArrayCollection.length that equals to 4 starting
from index 0 (zero)
I see:
going into the objects using for each item i see correctly:
item:[object Object]
item:[object Object]
item:[object Object]
item:[object Object]
going into the objects using for loop with
ModelLocator.ArrayCollection.length, it is not counting the full
length:
0 --this is page:springgraph16.UIComponent0.template1 with
index:0 and pageid:1
1 --this is page:springgraph16.UIComponent0.template2 with
index:1 and pageid:2
2 --this is page:springgraph16.UIComponent0.template3 with
index:2 and pageid:3
If I index into ModelLocator.ArrayCollection[3] in the for
loop I get errors.
example:
checked the length with:
trace("---lenbefore:" + __modelLocator.siteRef.length); //
displays a trace, ---lenbefore:3
__modelLocator.siteRef.addItem(templatesAllData);
trace("---lenafter:" + __modelLocator.siteRef.length) //
displays a trace, ---lenafter:4
THIS WORKS AND DISPLAYS 4 ITEMS:
for each (var item:* in __modelLocator.siteRef){
trace("item:" + item);
trace result is:
item:[object Object]
item:[object Object]
item:[object Object]
item:[object Object]
THIS DOES NOT WORK:
for(s =0 ; s < __modelLocator.siteRef.length; s++){
trace(s +" --this is page:" +
__modelLocator.siteRef[s]['template']);
trace("CHECK:" +__modelLocator.siteRef[3]['template']); //
this thoughts up an error below:
ERROR: RangeError: Index '3' specified is out of bounds.
which is why these do not work in the for loop:
for(s =0 ; s <= __modelLocator.siteRef.length; s++)
for(s =0 ; s < __modelLocator.siteRef.length+1;
s++)

Answer 1

If you use the debugger and step through the ArrayCollection
as it does each loop - what does the watch variables panel show?
This shouldn't make a difference, but out of curiosity -
after the AC has all it's day, if you make a copy of it and then
loop over it... what happens...? E.g.:
__modelLocator.siteRef.addItem(templatesAllData);
var newAC : ArrayCollection =
ObjectUtil.copy(__modelLocator.siteRef);
for(s =0 ; s < newAC.length; s++)
Or another idea... instead of accessing the AC via index
(e.g. siteRef[s]), what if in the loop you do a getItemAt(s)?